Limit error
I am trying to get my CNC cconversion up and runnning again after a couple years of downtime. It was found that I had a burnt resistor on my BOB which was my fault for trying to check for loose wires with the power on and dropped the BOB on the case chassis. I rreplaced the resistor and jumpered a burnt trace, replaced the BOB wired as it was. Now I have to click to 'disable limits' on the GUI to be able to make it active, I can then jog an axis one direction and is soon as I stop the GUI goes dark and i get "limit errors" Can anyone help me with troubleshooting this. A friend put this together for me and I dont have a great understanding of how everything works, but I am learning now.
Thanks
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Check your HAL file, it should contain information about the limits. After you know where they are connected (I assume to your parallel port), you can follow the wires up to the physical stuff.
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I just got done disconnecting all the limits from the BOB,, which i checked and were set up as normally open switches.
Limits should be NC (normally closed). Otherwise the wire can completely detach from the BOB and you will be none the wiser until the machine crashes.
Now I have to click to 'disable limits' on the GUI to be able to make it active,
Sounds like your logic is inverted, but if you sort out the switches and have then NC, that will probably fix it anyway
Nope, same error. Jog an axis and get joint 0,1 and 2 errors
Normally just because your jog speed is set too high and the pulses cannot keep up.
You get the error because the commanded position of the axis does not match the feedback position of where it actually got to
Set it to a slow rate, if it does not happen adjust until you have a reasonable rate that does not error
regards
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Is it possible that when i damaged the BOB it could have damaged my PC parallel port and its causing me issues, or that there is other problems with the BOB i can see?
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- Todd Zuercher
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Just need to drill down and isolate the source of the problem, then fix or replace.
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